60 Second Time delay for photo cell LED's
Ok here is my dilemma. I have created hallway lighting with leds using the same setup as the blue bawls photo cell lights Blue Bawls
. so what i need now is a way to delay the "on" time of the leds for 60 seconds after i break the beam. The trigger is a laser pointed at the photocell so when i break the beam the leds turn on. its currently running on 7.5V dc. Any suggestions or schematics are greatly appreciated .